var divM = document.getElementById("marking");
    divM.onclick = function () {
        alert("产品展示");
        window.location.href="wedding.html";
    };
 var divM1 = document.getElementById("service");
    divM1.onclick = function () {
        alert("定制服务");
        window.location.href="customization.html";
    };
   var divM2 = document.getElementById("guanyu");
    divM2.onclick = function () {
        alert("关于我们");
        window.location.href="About _Us.html";
    };
  var divM3 = document.getElementById("trends");
    divM3.onclick = function () {
        alert("新闻动态");
        window.location.href="journalism.html";
    };
    var divM4 = document.getElementById("phon");
    divM4.onclick = function () {
        alert("联系我们");
        window.location.href="relation.html";
    };